Ultrasonic Inspection Design and Application for Maincoolant Pipes of Third-Generation Nuclear Power Plants
This paper reviews the global development of third-generation nuclear power plants and examines the evolving requirements for main pipe inspection processes in the in-service inspection standards. Third-generation nuclear plants offer significant improvements in design and safety over previous...
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| Main Authors: | , |
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| Format: | Article |
| Language: | deu |
| Published: |
NDT.net
2025-03-01
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| Series: | e-Journal of Nondestructive Testing |
| Online Access: | https://www.ndt.net/search/docs.php3?id=30826 |
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| Summary: | This paper reviews the global development of
third-generation nuclear power plants and examines the
evolving requirements for main pipe inspection processes in
the in-service inspection standards. Third-generation
nuclear plants offer significant improvements in design and
safety over previous generations. However, with the
continued advancement of nuclear technology, the inspection
technologies for primary loop main pipes face increasingly
complex challenges, especially the detection of narrow gap
welds, which has become a critical technical issue for
nuclear plant safety.
Using the operational EPR and Hualong One nuclear power
plants in China as examples, the paper analyzes the
characteristics, specifications, layout, and inspection
scope of narrow gap welds in the main pipes. The narrow
gaps and complex layouts make it difficult for conventional
inspection methods to fully cover the welds, particularly
in confined spaces and irregular pipe structures. Achieving
high-precision, high-efficiency inspections is a key
challenge for engineers. Through an in-depth analysis of
the surrounding environment and nuclear island facility
layout, the paper highlights the spatial constraints in the
design of main pipe inspection equipment. The compact
arrangement of the reactor and auxiliary facilities further
complicates inspection tasks.
To address these challenges, the paper introduces a
lightweight, high-load automatic ultrasonic scanner
designed to improve inspection efficiency in complex
environments. This scanner uses advanced ultrasonic testing
technology to efficiently inspect welds in confined spaces.
Its core components include a high-load probe holder and a
remote control system for real-time data analysis.
The paper also discusses the practical application of this
technology at Taishan and Hualong One nuclear power plants,
where the new equipment has significantly improved
inspection accuracy and efficiency, supporting safe plant
operations. Finally, the paper looks forward to the future
development of main pipe inspection technology, emphasizing
advancements in automation, data processing, and remote
operation, which will enhance the safety and efficiency of
nuclear plants, supporting the sustainable growth of the
global nuclear industry.
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| ISSN: | 1435-4934 |